Shining Celebi writes: Mozilla has finally released Firefox 4, a couple months behind schedule. It features hardware accelerated graphics, UI performance improvements, a massive boost in Javascript performance, reduced memory usage, WebGL, a new HTML5 parser, App Tabs, tab grouping via the Panorama feature, bookmark and history syncing, and much more. Many users will also be happy to know the status bar has been more-or-less restored after Mozilla removed it in early betas. Firefox 4 scores over 3 times faster on Sunspider, V8, and Kraken.